Modeling of transmission lines excited by lightning strikes in the frequency domain2

In this paper the frequency domain Modeling of a multiconductor line illuminated by a nearby lightning stroke is described, considering also variations of the line parameters along its length (nonuniform line case).
Modeling of the illuminated line is based on Taylor’s formulation, while the incident electromagnetic field is described following Master and Uman’s expressions. The numerical Laplase transform algorithm is used for the frequency time transformation is required. Comparison whit an experimental result previously published is provided for an initial validation of the method. As a second application example, a test case is used to analyze the effect of the point of impact on the magnitude and waveshape of the transient overvoltages obtained. The effect of line nonuniformities is also discussed.